Mike, I just noticed their ad in QST. The gain quote is based upon having
the antenna up one wavelength, over ground and it is dBi not dBd. If you
work with one of the popular antenna modeling programs you will get a first
hand experience for these relative gain figures. They are a little
confusing. 73, John
----------
> From: Mike <no6x@inreach.com>
> To: towertalk@contesting.com
> Subject: [TowerTalk] Cushcraft X7
To: <towertalk@contesting.com>
> Date: Sunday, October 19, 1997 5:05 AM
>
> I am curious to learn of anyone who has puchased the new cushcraft X7 and
> how well it works. I have looked at it on the Cushcraft website, and they
> proclaim a 13.5 dB!
> Now realizing that I am relatively new to amateur radio, and realatively
> young, I have a question!
>
> HOW IN THE HECK DO YOU GET 13.5 dB GAIN OUT OF 3 ELEMENTS?
>
> At least this is what I understand the thing to have 3 elements on each
of
> the 3 bands that it covers.
> Are the measurements related to a rubber duck which I have read to have
> -5dBi? I think this would be about right.
> Lets see if it had 6dB REAL gain + 5dB for the rubber duck + 2.15 for a
> dipole (over isotropic) that would equal 13.15 that is close.
> Does someone else have the correct method which they measured this?
>
> Actually I am really looking to see what it is thought of as an antenna.
> I just threw in the Gain thing as a question, as I defy anyone to get
13
> dB out of 3 element on 18 feet of boom!
>
> Inquisitively yours on the left coast,
> Mike...NO6X
>
>
>
> Check out my home page at http://home.inreach.com/no6x
>
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